高等学校化学学报

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (11): 951.

• 研究论文 •    下一篇

沸石转晶的研究(Ⅲ)——NaY型沸石的稳定性及NaPc型沸石的结构

马淑杰1, 李连生1, 徐如人1, 叶朝辉2   

  1. 1. 吉林大学化学系;
    2. 武汉物理研究所
  • 收稿日期:1984-06-26 出版日期:1985-11-24 发布日期:1985-11-24

Studies on Trasformation of Zeolite Crystals (Ⅲ)--The Stability of Zeolite NaY and the Structure of Zeolite NaPc

Ma Shujie1, Li Liansheng1, Xu Ruren1, Ye Chaohui2   

  1. 1. Jilin University, Ghangchun;
    2. Wuhan Institute of physics, Wuhan
  • Received:1984-06-26 Online:1985-11-24 Published:1985-11-24

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摘要： 研究了原始凝胶3、3Na2O·Al2O3·10SiO2·200H2O在100℃NaY型沸石向NaPc型沸石转晶的晶化过程,应用电子显微镜、X-射线衍射、TMS-GC和固体高分辨Si29-NMR方法研究了沸石晶核的形成、晶体粒度和外貌的变化及液、固相中硅酸根离子存在状况及转晶中沸石结构的变化,并提出了转晶的液相传质机理。

Abstract: We investigated the crystallization of NaYand especially the transformation of NaYto NaPtype zeolite from an initial gel of batch composition 3.3Na2O·Al2O3· 10SiO2·200H2Oat 100℃. We found that there are three stages in the whoie process: the nucleation and crystal growth of NaYtype zeolite, the nucieation of NaPand the dissolutian of NaYand the crystal growth of NaPtype zeolite.In order to investigate the mechanism of this process.We proved the formation of nuclei of NaYand NaPtype zeolites in liquid phase by using the electron diffraction technique. We used the electrom micrograph, X-ray diffraction, TMS-GCand(HRMAS) solid state Si-29NMRtechnique comprehensively to investigate the changes of particle size and morphology of zeolite, the existing species and their distribution of poly-silicates in liquid and solid phases and the change of zeolite structure in the process of transformation of NaYto NaPc. Amore detailed liquid phase transportation mechanism of transformation was suggested.

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